1.The first stage of mitosis, during which the chromosomes condense and become visible, the nuclear membrane breaks down, and the spindle apparatus forms at opposite poles of the cell. 2.The first stage of meiosis, constituted by a series of events that include the thickening and coiling of ...
1). Sign in to download full-size image Fig. 1. Stages of oogenesis and folliculogenesis in the mouse. Primordial germ cells (PGCs) divide mitotically giving rise to oogonia that populate the genital ridge. Around embryonic day 12.5–13.5, oocytes enter prophase I of meiosis, that includes ...
In 1935, Pincus and Enzmann were the first to show that the removal of prophase I arrested rabbit oocytes from their follicular environment resulted in the spontaneous resumption of meiosis (Pincus and Enzmann, 1935). This finding supported a model where the surrounding somatic cells regulated maint...
In contrast to other model systems, temperature-induced changes during plant meiosis have been well studied. Since seasonal changes expose plants to a variety of environmental temperatures, it is extremely important to the agriculture industry to understand how temperature may be altering the seed or ...
The SUN1–SPDYA interaction is required for gametogenesis in mice In order to evaluate the in vivo function of the SUN1–SPDYA interaction during meiosis, we generated knock-in mice with a SPDYA-binding-deficient mutation W151R in the Sun1 gene using the CRISPR-Cas9 method (Supplementary Fig...
Cohesins are vital for chromosome organisation during meiosis and mitosis. In addition to the important function in sister chromatid cohesion, these complexes play key roles in meiotic recombination, DSB repair, homologous chromosome pairing and segregat
19. Synapsis (pairing) the association of homologous chromosomes during theprophasestage of meiosis that leads to the production of a haploid number of bivalents. 偶线期时,以同源染色体活跃的、特定的配对(联会)为特征,形成了单倍数的二价染色体。
Utakoji, T.: Chronology of nucleic acid synthesis in meiosis of the male Chinese hamster. Exp. Cell Res.42, 585–596 (1966). Article PubMed CAS Google Scholar Vivier, E.: Observations ultrastructurales sur l'enveloppe nucléaire et ses “pores” chez des Sporozoaires. J. Microscopie6,...
Chromosome distribution at mitosis and meiosis in most eukaryotes is mediated by kinetochores (centromeres) and by the microtubules and spindle pole bodies of the spindle apparatus. This chapter describes the mechanisms of chromosomes synapsis at meiotic prophase. It discusses two general observations. ...
identified several novel genes that might be critical players in meiosis in multiple species. These results demonstrate that our approach is highly efficient to discover evolutionarily conserved novel meiotic genes, and yeast can serve as a valuable model system for investigating mammalian meiotic ...